I just get rid of the gauges altogether and make the chart vs. time window take up the whole screen, it's easier for me that way
Anyways, try these. First one is basically what you had with two gauges changed to show WB data. #2 is more in the ballpark of how I'd do it, using charts instead of gauges. I didn't mess with any of the graphs in either
1.Layout.xml
2.Layout.xml